Milk-can hoist.



PATENTED OCT. 10, 1905. I. DEAOHMAN. I MILK CAN HOIST.

APPLICATION FILED DEC. 23, 1904.

UNITED STATES PATENT ormon.

ISAAC DEACHMAN, OF KILMAURS, CANADA, ASSIGNOR OF ONE-HALF TO LUTHER WVELLINGTON SHIPMAN, OF ALMONTE, CANADA.

MILK-CAN HOIST.

Specification of Letters Patent.

Patented Oct. 10, 1905.

Application filed December 23, 1904. Serial No. 238,165.

motion of a single lever will raise the milk-v can off the farmers wagon and convey it to the weigh-stand and to provide means whereby the hoist will automatically stop itself when it has reached the position at which it is desired to empty the can; and it consists, essentially, of a carrier of the type known as a hay-carrier running on a beam pivotally secured to the walls of the factory, asuitablyjournaled shaft to which the end of the rope of the carrier is secured, a second shaft coupled to the first shaft, means for supplying power to the second shaft, a lever adapted to throw the clutch in and out of engagement, a ratchetwheel and pawl adapted to hold the hoist in any position at which it is desired to stop it, means for causing the carrier when it reaches the end of its stroke to operate the lever and so disengage the clutch, and a counterweight secured to the carrier and adapted to draw it out to the end of the beam after the milk has been emptied out of the can, the various details of construction being hereinafter more particularly described.

The figure shows a perspective View of my carrier with a portion of the wall of the cheesefactory.

a is a portion of the wall of the cheese-factory, and bis the weigh-stand secured thereto.

0 is a carrier of the type frequently used for carrying hay-forks, the construction of which forms no part of my invention and need not be here described.

d is a beam or track pivoted on a bolt 6 to a projection f, secured to the wall. A tierod g, pivotally secured to the beam cl at an eyebolt 7L and pivotally secured at its other extremity to the wall of the factory, is provided to further support the beam 03.

11 is the movable pulley of the carrier, which has a hook jsecured thereto. This book is adapted to engage a bail k, which is secured to the milk-can lat two points m.

n is a rope or chain of the carrier, one end of which is secured at 0 to the carrier. The other end extends toward the building and is secured by suitable means to a shaft 9, suitably journaled in bearings q and r. The means I have shown for securing these to the shaft consists of a collar 8, which is clamped to the shaft by means of a set-screw t.

u is a second shaft in alinement with the first shaft and detachably secured thereto by means of a clutch w. This may be of any suitable form, that I have shown consisting of a pin 4; on one shaft, which is adapted to engage slots 00, proyided in a casting y, secured to the other shaft. A lever 2, pivoted to the wall at a point 3, is adapted to move this clutch in and out of engagement. Suitable bearings 4 and 5 are provided for this shaft. The first shaft 19 must be free to move in a longitudinal direction, while the shaft 14 must be held rigidly in position. To accomplish this, I provide on the shaft u collars 6 on each side of one of the bearings. To the end of the shaft 10 a pulley 8 is secured, which is suitably connected by a belt 7 or other suitable means to any convenient source of powersueh as a steam-engine, turbine, motor, or the likewhich is being operated continuously.

9 is a ratchet-wheel rigidly secured to the shaft 10.

10 is a pawl pivoted to the wall of the building at a point 11. This pawl is adapted to engage the teeth of the ratchet-wheel 9, and so hold the hoist in any position to which it may have been raised.

12 is a spring, one end of which abuts the ratchet-wheel and the other the bearing 1*, thus normally tending to press the two shafts p and u out of engagement.

13 is a lever pivoted to a projection 14, secured to the wall of the building at a point 15. The end of this lever is adapted to be engaged by the carrier 0 when it reaches itsinnermost position. The other end of this ,le.-.

IOO

ver is secured to a rope or chain 16, which passes through two pulleys 17 and 18, pivoted to the wall at two points 19 and 20, respectively, and is secured at its other end to the lever 2. It will thus be seen that when the carrier engages and moves the end of the lever 13 it will exert a pull on the rope or chain 16, which will move the lever 2, causing the clutch to become disengaged.

21 is a rope or chain secured at one end to the carrier and passing through a pulley 22, which is secured to a post or the like 23, placed some distance away from the end of the carrier-track, the other end of the said rope being secured to a weight 24. It will thus be seen that this weight normally exerts a pull on the carrier which will tend to move it to its outward position.

Having now described the various parts of my device I will now describe the manner of working the same. Assume for the sake of illustration that the carrier is in the position shown in the drawings, the can being filled with milk and ready to hoist up. The clutch w is then drawn into engagement by means of the lever 2, which is lightly held in engaged position by the operator until the end of the operation. This causes the shaft u to rotate the shaft 1), which winds up the rope n. This will raise the can Z until the pulley reaches the carrier 0. This operates in the well-known way the clutch contained therein and locks the pulley 2' to the carrier. The pull on the rope n being continued, the carrier 0 will continue to move along the track or beam cZ until it comes in engagement with a lever 13. When it does this, the pull will be exerted on the rope 16, which will operate the lever 2, and so throw the clutch out of engagement, as the lever is only lightly held in engagement by the operator. The milkcan may then be swung around to any convenient position and emptied into a vat contained on a pair of scales or other place desired. After emptying the can it will be much lighter, and the counterweight 24:, eX- erting a pull on it, will cause it to move out to its farthest position. Here the carrier will become unlocked in the manner well known in such carriers and allow the can Z to descend to its original position. If at any part of the operation it is desired to stop the hoist, the lever 2 may be operated to throw the clutch out of engagement and the pawl 10 brought down to engagement with the teeth of the ratchet-wheel 9. This will hold the hoist in any position.

It will thus be seen that I have devised a mechanism which will enable steam-power or the like, which is used in the process of manufacturing cheese, to be adapted to the use of operating a hoist to convey the cans of milk onto the Weigh-stand. Hitherto this has always been accomplished by hand or by a handhoist, which takes a considerable time to operate and is very cumbersome.

It is to be understood that certain variations may be made in the construction without materially departing from the spirit of my invention.

hat I claim as my invention is 1. In a device of the class described a carrier, a suitably-journaled shaft to which is secured the rope of the carrier, said shaft being journaled to prevent lateral play a ratchetwheel on the said shaft, a pawl adapted to engage the teeth of the said ratchet-wheel when desired, said pawl being pivotally supported, a second shaft detachably connected to the first shaft and means for causing rotation of the second shaft as and for the purpose specified.

2. In a device of the class described in combination a carrier, a shaft to which is secured the rope of the carrier, a second shaft, a clutch joining the two shafts, and a lever adapted when operated to throw the clutch in and out of gear and means for causing the clutch to be thrown out of gear when the carrier reaches the end of its stroke as and for the purpose specified.

3. In a device of the class described in combination a carrier, a suitably-journaled shaft to which is secured the rope of the carrier, a second shaft, a clutch joining the two shafts, a lever adapted when operated to throw the clutch in and out of gear, a lever pivoted to the building and adapted to be engaged by the carrier when it reaches the end of its stroke, a rope connected thereto and passing through a plurality of pulleys to the end of the lever operating the clutch whereby the clutch may be thrown out of gear when the carrier reaches the end of its stroke as and for the purpose specified.

4. In a device of the class described and in combination a carrier, a shaft, a rope connecting the carrier and the shaft, a second shaft detachably connected with the first shaft, a clutch forming the said. detachable connection, means for rotating the second shaft, means controlled by the movement of the carrier for operating the clutch and means for retracting the carrier, substantially as described.

5. In a device of the class described in combination a carrier, a suitably-journaled shaft to which is connected the rope of the carrier, a second shaft, a clutch adapted to join the two shafts, a lever adapted when operated to throw the clutch in and out of gear, a ratchetwheel on the first shaft, a pawl adapted to engage the teeth of the said ratchet, resilient means for normally holding the shafts apart, a lever pivoted to the frame one end of which is adapted to be engaged by the carrier when tachable connection between said shafts, a clutch forming the said detachable connection, means for rotating the second shaft, and means controlled by the movement of the carrier for operating the clutch substantially as described.

Signed at Ottawa, in the Province of Ontario, this 20th day of December, 1904,

ISAAC DEACHMAN. Witnesses:

RUssEL S. SMART, L. W. SHIPMAN. 

